Improvement in sewing-machines



' zsh ew-sheetz; E. BOUSCALJr.

' SEWING-MACHINE. v No.176.917. Patented May 2,1876.

fig. as

s Tm

. N. PETERS, PHOTO-LITHOGRAPHER, WASHINGTON D C -mrnn STATES ELOYIBoUsoAv, .13., OF NOBWALK, OHIO.

IMPROVENTENTIIN SEWING-MACHINES.

I Specification forming part of Letters Patent No. 176,917, dated May 2,1876; application filed To all jwhomt't may concern;

Be it known that I, E oI-Bo soA Jr., of Norwalk, county of Huron, andState of Ohio, have invented certain new and useful Improvements inSewing-Machines; and I do hereby declare the following to be a full,clear, and exact description of the invention, such as .willenableothers skilled in the art to which itpertains to make and use it,reference being had to the accompanying drawings, which formzpart ofthis specification.

My invention consists incertain 7 details. of construction in asewing-machine, as hereinafter specified and claimed. 7

In the drawings, Figure 1 is an inverted view of a machine, showing theshuttle-driver audits cam-slot, Fig. 2 is a side elevation of a machine,showing the vertical shaft, the cylinder, shuttle-driver, andfeed-shaft. Fig. 3'is a cro'ss-sectionof the feed-shaft, eccentricsleeve-journal, and its hanger. Fig. 4 is the shuttle and its details.Fig. 5 is a front elevation of the :feed regulatingand operatingmechanism. Fig. 6j'is the needle-bar with its wing device for keeping itfrom turning in its bearings.

O is the elevated horizontal shaft; Z Z are the bevel-gears. O is thevertical shaft. M is the cylinder, having the cam-groove N in itsperiphery, and crank-pin B in its lower face. I is the shuttle-driver,and K its cam slot. G is the feed-shaft, and L its crank-arm.

H is the eccentric sleeve, and. I its hanger. E is the shuttle; G, itslid;-F, the tensionspring, and i t notches for threading the tenslon.

The operation of my invention is as follows: The power is applied, inthis as in all machines of this class, to the elevated horizontal shaft0; thence it is communicated to the vertical shaft 0 throughthebevel-gears Z Z. The vertical shaft, with its cylinder M, engages,first, the horizontal rock-shaft O, which actuates the feed through thecam-groove N and crank-arm L, and, secondly, the shuttle driver P initscam-slot K, through the crank-pin B. The shuttle-driver is of theoscillating class, and drives the shuttle through an are, at a certainperiod in each revolution of the vertical shaft 0 and its crank B, thelatter operating, as stated, in the cam-slot K, gradually moving towardthe fulcrum, thereby destroyat the heel of the shuttle.

May 21, 1874.

ing the leverage equilibrium, and accelerating the motion of the driverP. This movement I improve by causing the shuttle to pass through theloop. This being done, the proper shape of the cam slot K andcrank-point B, moving away from the fulcrum of the shuttledriver P,allows the shuttle to slacken sufficiently for the needle-thread to bedrawn up cylinder llL-inclining from near the upper face to near thelower face of the same, and vice versa, in such a relation to thecrank-point B as to cause the shaft 0 to rock at proper times, and movethe feedin suitable coordination with the other mechanisms.

It is desirable in sewing-machines that the feed should be so faradjustable as to permit the raising or depressing of the same as thevarious kinds of work to be performed require. This I accomplish byfitting the end of the rock-shaft 0, immediately under and supportingthe feed mechanism, into an eccentric'sleeve-journal, H, held in thehanger I. By inspection of the drawings, Fig. 3, it is obvious that thevertical adjustment of the feed is performed by turning the eccentric Hin the hanger I. I

My shuttle is closed and semi-cylindrical,

with one plane face coming in contact with projects up through a slot inthe needle-plate,- and moves on a bar, D, one end of which is pivoted ina hanger extending from a cloth-.

plate. The other end of bar D is recessed as shown.

,ATENT litre.

This motion is Rig-idly affixed on shaft 0 is a lever, B, having an arm,at. extending upwardly, and'a curved downward projection, 0, with anenlarged tubular threaded end, f, for receiving a pointed screw, g. Inthe rear of the lever It, and on the shaft, is a lever, S, held looselyin place by a collar on the shaft. This lever is connected with lever Bby a helical spring, d, and has an upper arm, I), with an inclined orcam surface, h, on its rear face, and a lower arm, 0, whose end isbeveled, and rests against the point of the screw g.

As the shaft 0 is rocked the arms a. and b strike against a point, K, onthe feed-bar, and thereby move it back-and forth. At the same time thecam H 011 the arm 11 plays in the recessed end of bar D, and elevatesand depresses the same, which motion is communicated to the feed-bar.

The distance between the upper ends of armsa and 1) determines thelength of feed,

and this distance is regulated by the screw g; for the farther the pointextends through the sockets f, the closer are brought the arms a I), andas the-screw is withdrawn the arms separate. The point of the screw,comingin contact with the beveled end of arm 0, causes theseadjustments; and I prefer to make the point of the screw conical. Apositive and regular motion, both horizontally and vertically, is thusgiven to the feed. I

The device which I make use of to prevent a round needle from turning inits bearing is thefollowing: The cross-head X on needlebar a has aguide, W, projecting from the side, and fitting loosely in a groove cutin the corresponding side of the front plate of the machine, and in aline parallel with the needie-bar. The groove, of course, allows theguide 'to move vertically as'the needlebar carries it in its regularmotion, but the groove and guide being fitted closely enough to preventthe needle-bar from turning.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

1. Asa means of causing the forward motion of the shuttle and upwardmotion of the needle to stop at the same instant, and begin the reversemotion simultaneously, the horizontal oscillating-lever shuttle-carrierP, provided with the cam-slot K, the needle-bar n, provided with thecross-head X and intermediate mechanism, substantially as set forth, fordriving the same.

2. The combination, with the horizontal driveshaft 0 and vertical shaft0, of the rock-shaft O, for actuating the feed, substantially asdescribed.

3. The combination, with the rock-shaft O and feed mechanism, of therigid jaw- S, movable pivoted jaw F, and adjustable screw g, forregulating the throw of the feed, substantially as described.

4. The combination, with the shuttle, of the lid G, the said lid beinghinged directly to the heel of the shuttle,substantially as set forth.

5. The combination, with needle-bar a, of cross-head X, guide W, andface -plate, provided with the slot u, whereby any tendency to revolveis obviated.

. 6. The combination, with the shafts O O and bevel-gears ZZ, of thecylinder M, bearin g the cam-groove n in its periphery, crank-pin B onits lower face, the crank L, and shuttle arm P, provided with the curvedslot K, substantially as shown and described.

7. The shuttle E, constructed as described, and provided with theadjustable tensionspringF and the threading guide-notches i i,substantially as shown and described.

8. The combination of the feed-bar A, rigid lever 1t, loose lever S,spring d, and conicalpointed screw g, substantially as shown anddescribed.

ELOI BOUSOAY, JR.

Witnesses:

N. S. G. PERKINS, J. R. PERKINS.

